Free Plant Breeding and Genetics MCQs with Answers
329 Plant Breeding and Genetics MCQs from Agriculture, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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- A. Template
- B. Messanger
- C. Leader
- D. Transfer
Explanation: During transcription, DNA provides the template whose base sequence directs formation of mRNA.
Correct answer: Template- A. Endosperm
- B. Seed
- C. Ovary
- D. Fruit
Explanation: After fertilization, the ovule matures into a seed, while the ovary develops into the fruit.
Correct answer: Seed- A. Joseph Kolreuter
- B. Vavilov
- C. Darwin
- D. Dobzhansky
Explanation: Darwin treated sudden variations or sports as having no major significance in evolutionary change, which he explained mainly through…
Correct answer: Darwin- A. SunflowerAccess Government Careers
- B. Sugarcane
- C. Maize
- D. Sugar beat
Explanation: Autopolyploidy has been used successfully in sugar beet to develop polyploid forms with improved plant size and vigor.
Correct answer: Sugar beat- A. All of these
- B. GCA & SCA effects
- C. D & H components
- D. GCA & SCA variances
Explanation: Line × tester analysis estimates general combining ability (GCA) and specific combining ability (SCA), along with their variances and…
Correct answer: All of these- A. Among males
- B. Males & females
- C. Among females
- D. All of these
Explanation: A line × tester design crosses several lines with one or more testers, so the mating is between the designated female lines and male…
Correct answer: Males & females- A. Zuhee yaun
- B. Yaun Pingpong
- C. Yaun Longping
- D. None of these
Explanation: Yuan Longping developed and popularized commercial hybrid rice technology and is therefore widely known as the father of hybrid rice.
Correct answer: Yaun Longping- A. An enzyme
- B. A vitamin
- C. A protein
- D. A hormone
Explanation: Auxin is a plant growth hormone involved in cell elongation, apical dominance, root initiation and tropic responses.
Correct answer: A hormone- A. tRNA
- B. mRNA
- C. rRNA
- D. None of these
Explanation: mRNA carries the genetic message and provides the codon template that ribosomes read during translation.
Correct answer: mRNA- A. Introduction
- B. Mutation
- C. Selection
- D. Hybridization
Explanation: Selection is regarded as the earliest plant-breeding method because farmers first retained seeds from desirable plants for the next…
Correct answer: Selection- A. Both B and C
- B. Polygenes
- C. Plasmogenes
- D. Multiple alleles
Explanation: Self-incompatibility is commonly controlled by a multi-allelic S locus, where pollen is rejected when its incompatibility allele matches…
Correct answer: Multiple alleles- A. Functional pollen
- B. Sterile pollen
- C. Sterile anther
- D. All of these
Explanation: Male sterility means the plant fails to produce viable, functional pollen, even though female fertility may remain normal.
Correct answer: Functional pollen- A. S*x limited trait
- B. S*x influenced trait
- C. S*x linked trait
- D. None of above
Explanation: Most common colour blindness is an X-linked recessive trait, so it is transmitted through a sex chromosome and occurs more often in males.
Correct answer: S*x linked trait- A. East Asia
- B. South America
- C. West Africa
- D. North America
Explanation: Cultivated sunflower originated in North America, where it was domesticated from wild sunflower populations.
Correct answer: North America- A. Speciation
- B. Specialization
- C. Smog
- D. None of theseGeology
Explanation: Speciation is the evolutionary process by which populations become sufficiently different to form new species.
Correct answer: Speciation- A. Dr.Muhammad Sharif
- B. Theodore-saussure
- C. Shafiq Baloch at.el
- D. Sach and knoop
Explanation: Theodore de Saussure helped establish the importance of nitrogen and other mineral nutrients in plant growth through controlled…
Correct answer: Theodore-saussure- A. Cystine
- B. Cystein
- C. Methionine
- D. All of these
Explanation: Sulphur occurs in the amino acids cystine, cysteine and methionine; cystine contains a disulphide bond formed from two cysteine molecules.
Correct answer: All of these- A. Genetics
- B. Embryology
- C. Biology
- D. Histology
Explanation: Genetics studies heredity and variation, explaining how traits are transmitted and differ among organisms.
Correct answer: Genetics- A. 32
- B. 15
- C. 16
- D. 3
Explanation: The traditional list recognizes 16 essential elements for plant growth, including carbon, hydrogen, oxygen, the primary and secondary…
Correct answer: 16- A. Chailakhian
- B. Gassner
- C. Lysenko
- D. Wrinkker
Explanation: Trofim Lysenko introduced the term vernalization in 1928 for inducing flowering by exposing seeds or seedlings to low temperature.
Correct answer: LysenkoPlant Breeding and Genetics MCQs: common questions
Are these Plant Breeding and Genetics MCQs free?
Yes. All Plant Breeding and Genetics MCQs from Agriculture are free on TestUstad, with unlimited attempts and no account needed. Nothing on this page is a sample or a trial.
How many Plant Breeding and Genetics MCQs are on this page?
There are 329 Plant Breeding and Genetics MCQs in the Agriculture bank, shown 20 to a page with the correct answer and an explanation on each.
Does every Plant Breeding and Genetics MCQ have an explanation?
Yes. Each Plant Breeding and Genetics question shows the correct option and a written explanation of why it is correct, so a wrong answer teaches you something rather than just being marked wrong.
Can I take a timed Plant Breeding and Genetics test?
Yes. The practice button on this page starts a free Plant Breeding and Genetics test drawn from the Agriculture bank. It marks each answer instantly, gives you a score at the end, and can be retaken as many times as you like.